Training:
In Dehlia and its environs, there exists a sect of assassins known as the Brothers of the Dead. They pay handsomely for pairs of twins, which they train in the ways of death. When the twins come of age, their final test is to slay their sibling (in what is basically a game of Assassin, but for srs). Asmir and Asmul were one such pair; bastards of an elven raider on a frontier woman. Asmir was the more cunning of the pair, but Asmul was stronger. When the time of the Test came, Asmir was ready - he anticipated what was to come, and disguised himself as the Herald of the Test. So disguised, he delivered a ceremonial dagger to Asmul... by the pointy end, with a side of poison. He wears several of Asmul's fingerbones on a necklace to this day. Since his induction, Asmir has been a successful member of the Brothers, further mastering disguise and deception. He is attributed with a number of slayings, including one particularly daring operation where he slew and assumed the identities of no fewer than three men and two women over the course of a week to work his way to his true target, the late Thearch Inach of the Sun Fists company of the Knights of Pelor, then stationed in Malas Farngrey.

Psychology:
Asmir is zealously loyal to the Skullfathers, the council of the leaders of the Brothers of the Dead. He only kills who he has to, and only on orders / in the name of the mission. Outside of his work, Asmir lives like a monk; a hard cot, cold water, and bread are his daily fare. He keeps his knives sharp, but keeps his armor in neither very good nor very bad repair; either would be too noticeable. He does not let it be known that he is an assassin; if working with a party, he acts the part of a common 'adventuring locksmith / silver-tongued rogue' until stuff comes up.

Quotes (Sadly, never used in-game because they would've given him away):
"Take life seriously, when taking life is your profession."
"I knew a man once who $FOO. He's dead now."
"I knew a man once who $FOO. He was me."
"By my brother's bones!"